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Design Team #11 1

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Team Members Jeffery Aucoin Dima Eshtaya Sean Milley Jamie Zwicker Team Supervisor Dr. Robert Bauer 2

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Introduction Existing DesignProposed Design 3 http://www.jacqdesign.com/img/blog/photos/RollerbladeCrossfire 4D.jpg

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Rubber Stop Pad 4

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Existing Design Rubber Pad attached to the heel of one rollerblade To stop user must push the pad against the ground to create a braking force 5 http://www.skatescool.com/inline-skating/learn-how-to-t-stop- on-inline-skates/

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Areas of Improvement Balance and Stability Difficulty/Technique Pad Wear and Lifetime Stopping Distance 6 http://www.skatescool.com/inline-skating/learn-how-to-t-stop- on-inline-skates/

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Center of Mass 7

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Testing Average maximum speed: 30km/h Average stopping distance from 20km/h: 13m Video Clip or Picture of Actual Testing 8

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Requirements of Proposed Design 9

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Design Requirements 1. Removable 2. Support a 225lb user 3. Improved braking distance 4. Maintain mobility/stability 5. Controlled stop 6. Increased lifetime 7. Serviceable 10

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Foot Support Wheel Frame and Assembly Power Supply Brake Actuator and Application Control Unit 11

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Foot Support Ability to attach over existing footwear Modify existing snowboard binding Add third strap Adjust mobility of back support 12 http://5150snowboarding.com/product/ff1500

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Wheel Frame Housing for all components of the skate Square Channel Iron Dimensioned to incorporate range of shoe sizes 13

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Wheel Assembly All rotating pieces Axles Wheels Bearings Brake rotors 14

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Electric Band Drum Disk 15

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Electric/Magnetic Brakes Good for high speed braking Provides energy feedback Brake force diminishes as speed decreases Cannot lock up 16 http://www.flightglobal.com/blogs/runway-girl/Gear%20shot%201.JPG

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Band Brakes High actuator forces due to limited space Easily serviceable Susceptible to vibrations 17

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Drum Brakes Least actuating force Complex setup Not easily serviceable Poor heat dissipation Prone to brake fade 18 http://auto.howstuffworks.com/auto-parts/brakes/brake-types/disc- brake1.htm

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Disk Brakes High actuating forces High rate of heat dissipation Less susceptible to brake fade Easily serviceable 19 http://www.jejamescycles.co.uk/product-images-large/avid-juicy-3- hydraulic-disc-brake-40268.jpg

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Brake Torque Calculations 20

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Disk Brake Calculations 21

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Hydraulic Pump Solenoid / Piston Setup Electric Motor with Power Screw and Piston Setup 22

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Hydraulic Pump Provides adequate pressure Too Large in size / weight High cost 23 http://www.mesltd.co.uk/images/ZSIM21118476.jpg

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Solenoid / Piston Setup Provides adequate force Forces diminishes with displacement Large power requirement High current draw 24 http://www.fwmurphy.co.uk/images/RP23xx_solenoid_medres.jpg

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Electric Motor with Power Screw and Piston High torque motor High forces generated High pressure output Low power consumption Low cost, weight and size 25 http://www.robotshop.ca/rbban07 -banebots-planetary- gearmotor.html

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Power Screw Calculations Power Screw Specs Output Force Output rpm Output Rev/s Torque N*m Torque in*lb Thread Type 4447.41.45412.869 -20 Left Hand Force LbForce N 412.91836.6 26

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Solar Alternator Manual Battery 27

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Power Supply Solar Alternator Manual Power Battery Power 28 http://www.thesource.ca/estore/product.aspx?language=en - CA&catalog=Online&category=RC+Toy+Batteries& product=2300322

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Hydraulic Lines Wired Wireless 29

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Hydraulic Lines Simple Control Connects users hands to feet Mobility compromised 30 http://media.rei.com/media/dd/84f36172-d484-4224-a6cc-00a2fa3e0ec6.jpg

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Wired Additional requirements Connects users hands to feet Mobility compromised 31 http://ecx.images-amazon.com/images/I/41o%2B2866- lL._SL500_AA280_.jpg

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Wireless Additional Requirements Eliminates physical connection Mobility maintained 32 http://www.robotshop.ca/polol u-high-power-motor-controller- 1.html http://www.robotshop.ca/dfrobot- usb-microcontroller- atmega168.html http://www.robotshop.ca/sfe-xbee- explorer-regulated.html

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Budget 1 Braking, 1 Non-braking DescriptionQtyUnit PriceTotal PriceTotals Braking Prototype1$100.00 Planetary gear and power screw motor1$35.55 Rotor2$10.00 $20.00 8 x 90mm wheels with bearings1$79.99 Hydraulic brake caliper with lever controlled piston1$150.00 Hydraulic brake caliper1$80.00 Hydraulic fluid1$20.00 Attachment screws and bolts1$20.00 ratchet straps6$9.99 $59.94 strap buckle6$12.99 $77.94 axle rod1$6.50 square channel1$20.00 plastic foot support2$45.00 $90.00 Section Sub-Total $759.92 Wireless Controller Transmitter1$40.00 Receiver1$40.00 Micro Controller1$108.00 Motor Controller1$50.00 Section Sub-Total $238.00 Safety Equipment Helmet1$29.99 Mouth guard1$10.00 Section Sub-Total $39.99 Power source battery pack and charger for actuator motor1$23.99 16 AA batteries for wireless controller1$20.00 Section Sub-Total $43.99 Total Summary sub total $1,081.90 13% tax $140.65 10% miscellaneous $108.19 final total $1,330.74 34

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Existing Design vs. Proposed Design 35

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Conclusion 36

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The End 37